PHP运行机制分析(多图)

简介：这是PHP运行机制分析(多图)的详细页面，介绍了和php,有关的知识、技巧、经验，和一些php源码等。

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Introduction

Apache

Mime type handler
? AddType application/x-httpd-php .php
? AddType application/x-httpd-php-source .phps
Server context
? Override php.ini (php_value, php_flag, etc)
? Environment variables(PHP_SELF, etc)
? Create Child Process/Thread

CLI (command line interface)

CLI ≈ CGI SAPI
differences
? start up in quiet mode by default
? plain text error message(no http header)
? implicit_flush always on
? max_execution_time is set to unlimited
? others

Embed

Embed = Mini CLI

php5embed .lib

example.c

C++代码

1. #include <php_embed.h>
2. int main (int argc, char *argv[]){
3. PHP_EMBED_START_BLOCK(argc, argv)
4. zend_eval_string(“echo ?Hello World?;”, NULL, “Embedded Code” TSRMLS_CC);
5. PHP_EMBED_END_BLOCK()
6. return 0;
7. }

Lexer(flex)

Parser(bison)

Compiler

Opcode

C++代码

1. struct zend_op {
2. opcode_handler_t handler;
3. znode result;
4. znode op1;
5. znode op2;
6. ulong extended_value;
7. uint lineno;
8. zend_uchar opcode;
9. };

Executor

Cacher

Encoder / Decoder

Debugger

本文来源: Ben ben.yan@msn.com

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